our auxiliary computating machine." "A poor time for joking, Captain." "It's no joke," cried Nibley. "Here I am." Douglas eyed Nibley with a very cold and exact eye. "No," he said. "No. I can't use him. I'm computant-mechanic." "And I'm captain," said Kroll. Douglas looked at Kroll. "We'll shove through to Jupiter with just our leaky set of radar-computators; that's the way it'll have to be. If we're wrecked halfway, well, we're wrecked. But I'll be damned if I go along with a decrepit son-of-a-witch-doctor!" Nibley's eyes watered. He sucked in on himself. There was a pain round his heart and he was suddenly chilled. Kroll started to speak, but a gong rattled and banged and a voice shouted, "Stations! Gunners up! Hammocks! Takeoff!" "Takeoff!" "Stay here!" Kroll snapped it at the old man. He leaped away and down the rungs of the ladder, leaving Nibley alone in the broad shadow of the bitter-eyed Douglas. Douglas looked him up and down in surly contempt. "So you know arcs, parabolas and orbits as good as my machines, do you?" Nibley nodded, angry now that Kroll was gone: "Machines," shrilled Nibley. "Can't do everything! They ain't got no intuition. Can't understand sabotage and hatreds and arguments. Or people. Machines're too damn slow!" Douglas lidded his eyes. "You—you're faster?" "I'm faster," said Nibley. Douglas flicked his cigarette toward a wall-disposal slot. "Predict that orbit!" Nibley's eyes jerked. "Gonna miss it!" The cigarette lay smouldering on the deck.